This document summarizes the key differences between sales and marketing. Sales focuses on selling existing products and services to generate revenue in the short-term, developing customer relationships. Marketing focuses on understanding customer needs and directing company strategy to profitably meet those needs in new market segments over the long-term. While sales and marketing need to work together, they require different skills and perspectives - sales looks out from the company to customers, while marketing looks back from customers to help guide the company's future direction.